Nice creature
Lots of "SHADING" that highlights the toned, muscular detailing of the "CREATURES-BODY", The level of shading favors the sketchy look of it, while adding depth to it, Definitely no need for color Its unearthly appearance holds an all-knowing aura, what with the presence of wings, and the facing of an "UPWARDS-DIRECTION", The vertical layout was clever in that it allowed the artist to draw an extended length of the creature, Dissipation towards the end only adds to its mysteriousness, and the overall quality.
~~THINGS TO IMPROVE ON~~
I think you should have added some type of glow to the eyes maybe with the same yellow shading as the backround.
~X~